Case Study

How Outbound Hero sends 300K emails monthly at 3% bounce rate
A B2B lead gen agency serving 55+ markets with reliable email data.
Outbound Hero, a B2B lead generation agency specializing in commercial cleaning companies, significantly improved their email prospecting by switching to Findymail. After testing multiple data providers, they discovered Findymail consistently delivered superior email coverage and validation accuracy, enabling them to scale confidently to 300,000 emails per month at a 3% bounce rate.
With Findymail, Outbound Hero:
- Scaled to 300,000 emails found per month
- Brought bounce rates down to a consistent ~3%
- Achieved 80%+ email discovery rate with no additional validation needed
Meet Outbound Hero
Outbound Hero is a specialized B2B lead generation agency that helps commercial cleaning and janitorial companies across the United States land new clients through targeted cold email campaigns. With approximately 55-60 active markets, they deliver quote-ready leads by focusing on what matters most: location-specific prospects.
Their approach is built on high relevance and high volume, focusing on reaching location-specific decision makers such as office managers, facility managers, and operations managers on behalf of their customers.
The challenge
Before Findymail, founder Spencer Painter faced the same data quality problems that plague most cold email operations. Using legacy providers, he quickly discovered critical gaps that threatened his ability to scale.
Insufficient valid email data
The main bottleneck was data quality: legacy providers weren't delivering the volume of valid emails Outbound Hero needed. Spencer found himself paying for email credits that frequently turned out to be invalid, forcing him to validate emails separately, adding extra steps, tools, and costs to his workflow.
High bounce rate
Campaigns were experiencing bounce rates above 4%. For an agency promising quote-ready leads, high bounce rates weren't just a technical problem - they directly impacted sender reputation and deliverability.
"I had that issue with some email validation tool and also even some email providers that people know of that say it's valid emails. And then it was getting high bounce rates." - Spencer Painter, Founder
Manual and time-consuming processes
Beyond data quality, the workflow itself was painful. Bulk selection meant repeatedly saving batches and starting over, a tedious cycle that consumed hours. For a solo founder trying to scale, every minute spent on manual data work was a minute not spent serving clients. After just 1-2 months, Spencer knew he needed a better solution.
The solution
Spencer discovered Findymail early in his journey and decided to test it against his existing setup. What followed was a rigorous evaluation that would determine the foundation of his entire data infrastructure.
Testing multiple providers
Rather than blindly committing to a single tool, Spencer took a methodical approach. He tested multiple email data providers to see which would deliver the best results. The winner was clear: Findymail consistently found more emails and delivered better validation accuracy.
"I put other email providers in front of Findymail and usually Findymail was capturing those emails. Meanwhile, the ones that were testing before weren't capturing the email or they captured an email that wasn't valid." - Spencer Painter
How Outbound Hero uses Findymail
Today, Findymail is the first stop in Outbound Hero's prospecting workflow. Outbound Hero identifies location-specific decision makers within their clients' service radius, generating a list with either full name + company domain or LinkedIn profile for each prospect. They then use Findymail in Clay to find valid emails via API. Valid emails go directly into campaigns with no additional validation required.
"I know that Findymail is going to be able to capture more emails than pretty much any other data provider that I've ever used." - Spencer Painter
By the numbers
~3% bounce rate: consistently low bounce rates mean better deliverability and sender reputation across all 55+ markets.
80%+ email discovery rate: Findymail finds valid, working emails for at least 80% of the prospects Outbound Hero identifies - an impressive hit rate that enables high-volume campaigns without sacrificing quality.
300,000 emails found monthly: in a single month, Outbound Hero used approximately 300K Findymail credits, a testament to both the scale they've achieved and their confidence in the data quality.
Zero validation costs: because Findymail's emails are reliable, there's no need for additional validation tools or steps, simplifying the tech stack and reducing costs.
"I know that Findymail will find the email and a valid email. I know for sure that there's about a 3% bounce rate and that's it. That's the peace of mind knowing that's our primary way to find valid emails." - Spencer Painter
Why Spencer recommends Findymail
"You know that Findymail is going to be that first stop and probably your best bet. It's going to give that peace of mind and simplicity which will help you grow your business."
- Spencer Painter, Founder of Outbound Hero

The impact
- Operational scale: Outbound Hero scaled from a solo operation to 55+ local markets with reliable data infrastructure.
- High-volume deliverability: Campaigns using Findymail consistently run at ~3% bounce rates, even while sending 300,000 emails per month.
- Strong email coverage: Findymail delivers an 80%+ email discovery rate on targeted, location-specific decision makers.